Generate a random number in a certain range in MATLAB

Question

How can I generate a random number in MATLAB between 13 and 20?

Answer 1

You can also use:

round(mod(rand.*max,max-1))+min

Answer 2

Best solution is randint , but this function produce integer numbers.

You can use rand with rounding function

  r = round(a + (b-a).*rand(m,n));

This produces Real random number between a and b , size of output matrix is m*n

Answer 3

ocw.mit.edu is a great resource that has helped me a bunch. randi is the best option, but if your into number fun try using the floor function with rand to get what you want.

I drew a number line and came up with

floor(rand*8) + 13

Answer 4

r = 13 + 7.*rand(100,1);

Where 100,1 is the size of the desidered vector

Answer 5

if you are looking to generate all the number within a specific rang randomly then you can try

r = randi([a b],1,d)

a = start point

b = end point

d = how many number you want to generate but keep in mind that d should be less than or equal to b-a

Answer 6

http://www.mathworks.com/help/techdoc/ref/rand.html

n = 13 + (rand(1) * 7);